Describe Fig. E6.4: identify the classes and their associations.

Update the diagram stepwise.

(a) A plan pertains to a single project and involves one or more workers and one or more activities.

(b) A worker may have zero or more plans, and a plan must belong to a single worker.

(c) Each plan contains a single schedule. Given a plan, you can determine its schedule, but given a schedule, you are unable to determine the plan to which it pertains.

(d) When an activity is on a schedule, it is called a scheduled activity, and the start date, end date, and duration are maintained for the scheduled activity. Each schedule may have zero or more activities, but an activity must be associated with a single schedule.

(e) A milestone, a major point in project, is a special type of scheduled activity where it has zero or more work products that have a specific status. A milestone has any number of work products associated with it, and a work product may be related to any number of milestones.

Transcribed Image Text:

Plan Worker Fig. E6.4 Plans, workers, projects, and activities Project Activity